I teach in a secondary school. Today, we have we told that if we organise any trips (including a level biology field trip that they need to do some skills assessments) then we have to also factor in the cost of cover for teachers at £160 per teacher per day - so for the biology field trip, it's 5 days, 3 or 4 teachers depending on numbers!
I just don't think that it's fair/ right to pass that cost on to parents. Especially when the school employs cover supervisors! It will simply mean that the number of trips we run are severely reduced, to the detriment of the kids :-(
Would you be happy to pay potentially an extra £10 per day on the cost of a trip to pay for cover? Or AIBU?